Checking the sensor
Remove the coolant temperature sensor and place the measuring part of the sensor in water. Slowly heating the water, measure the resistance of the sensor between contacts 1 and 3 of the sensor connector.
ECTS Characteristics
| Temperature | Resistance |
| -20°C | 14,130-16,830 kOhm |
| 0°C | 5790 Ohm |
| 20°C | 2310-2590 Ohm |
| 40°C | 1150 Ohm |
| 60°C | 590 Ohm |
| 80°C | 320 Ohm |
Checking the wiring
With the ignition on, measure the voltage between the contacts of the wire part of the connector and the ground.
The article is borrowed from the website: HyundaiBook
| Circuit under test | Nominal voltage |
| Contact 1 - "ground" | 5 V |
| Contact 2 - "ground" | 0 B |
1. Sensor "mass"
2. Not used
3. Air flow signal